In the interview, Harry said: “I have probably been very close to a complete breakdown on numerous occasions when all sorts of grief and sort of lies and misconceptions and everything are coming to you from every angle.”

He admitted he struggled with being in the limelight like his mother was, given she died after being followed by paparazzi.

He said: “I think being part of this family, in this role, in this job, every single time I see a camera, every single time I hear a click, every single time I see a flash, it takes me straight back, so in that respect it's the worst reminder of her life, as opposed to the best.”

Prince William

Harry’s older brother William hasn’t let being second in line to the throne stop him from revealing his personal mental health struggles.

He said: “I've thought about this a lot, and I'm trying to understand why I feel like I do, but I think when you are bereaved at a very young age, any time really, but particularly at a young age, I can resonate closely to that, you feel pain like no other pain.”

William said he was able to spot his own mental health problems. (Getty Images)

She’d also said there was an importance in getting people to talk about their mental health.

Meghan has also been keen to talk openly about the importance of good mental health, and many people who have worked with her have said she taught them about it.

Her former hairdresser, George Northwood, said: “I have enjoyed every minute collaborating with this amazing couple who not only champion small businesses but have taught me so much about diversity, equality and the importance of good mental health.”

Before the couple mothballed their Sussex Royal Instagram account, they urged their followers to look after their mental health.

They signed off by saying: “Until then, please take good care of yourselves, and of one another.”

The Duchess of Cambridge

Kate, also 38, is particularly focused on mental health in children in her royal work, and has spoken about making sure her children know they can speak to her or William about their feelings.

Speaking about life under lockdown during the coronavirus pandemic, the duchess said they had “ups and downs” appreciating it was the same for “lots of families”.

Kate focuses lots of her work on children's mental health. (Getty Images)

She said: “At times it has also been a huge challenge, even for me, who has support at home that most mothers do not.

“It's so hard. You get a lot of support with the baby as a mother, particularly in the early days, but after the age of one it falls away.”

Princess Diana

Years before her sons set about tackling stigma when it came to talking about mental health, Diana was talking about hers.

In 1995, having left the Royal Family and divorced husband Prince Charles, she gave an interview to Martin Bashir at the BBC about life in the palace.

Diana was one of the first royals to speak about her mental health. (Getty Images)

Speaking about having her first son, William, she said: “It had been quite a difficult pregnancy – I hadn't been very well throughout it – so by the time William arrived it was a great relief because it was all peaceful again, and I was well for a time.

“Then I was unwell with postnatal depression, which no one ever discusses, postnatal depression, you have to read about it afterwards, and that in itself was a bit of a difficult time. You'd wake up in the morning feeling you didn't want to get out of bed, you felt misunderstood, and just very, very low in yourself.”

Asked about how it affected her marriage, she said: “Well, it gave everybody a wonderful new label - Diana's unstable and Diana's mentally unbalanced. And unfortunately that seems to have stuck on and off over the years.”

The trailblazing royal’s openness has helped her sons continue her work in breaking down the stigma.